Improvement in steam-engines



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CARR., or N nwvonn,l N. Y.

Letters; Patent No. 93,053. dazed .may 27, 1869.

IMPROVEMENT IN' STEAM-ENGINES.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it ma/y conce/m Be it known that I, W. H. GARR, of the city,county, i and State of New York, have invented a new and usefulImprovement in Steam-Engines, of which the fol-r` lowing is a full,clear, and exact description, reference being had to the accompanyingdrawing, forming part of this specification, and in'whichf Figure lrepresents a side elevation of a steamengine, constructed in accordancewith myi'mprovement;

Figure-2, a sectional elevation of the same, taken in a plane parallelto iig. 1; and

Figui-e 3, a sectional view at right angles to figs. l and 2, of certainparts connected with the admission and discharge of steam to-and fromthe cylinder. I

Similar letters of reference indicate'A corresponding parts.

My invention consists in the arrangement of a reciprocating cyunder,with a piston disposed to occupy a stationary position relatively to thereciprpcating motion of the cylinder, by or through which thedriving-power is communicated, but both hung so as'to have a rockingmotion on or from a trunnion or trunnions disposed beyond the stroke ofthe cylinder, and the piston having arranged within it, for operation inconnection with suitable passages made therein or through the valve,which governs the motion of the cylinder; also, the invention includescertain details of construction and arrangement of the same foroperating the engine when constructed as described.

Referring to the accompanying 'drawing- A represents the frame of theengin'e,and

B, its working-cylinder, which is arranged to recip` rocate in directionof itsl length, and lthrough theintervention of levers O C', attached toa rock-shaft, D,

a pitman, E, and crank F, serves to communicate the necessary motion tothe driving-shaft G.

- His the piston, which'occnpies a stationary position relatively to thereciprocating vmotion of the cylinder, and is made hollow to receivewithin it vthe valve I, that workingin connection with suitable ports orpassages a. and 11,11, made in or through the piston, serves to controlthe reciprocating action of the cylinder. This valve may be of anysuitable description.

vlhe port a, in the arrangement shown, forms the exhaust, and the portsb b, the passages to opposite sides of the piston.

J is the piston-rod, which is made hollow, and is formed with vapartition, c, down through it, which serves. to establish inlet andexhaust-passages dand 0,.

the inlet-passage d being in .communication with the steam-space orchamber on back of the valve, and the exhaust-passage e communicating,by'a connecting or bridge-passage, with the eXhaust-cavityia.

These passages d and e connect, at their lower ends, with cross-passagesf and y, made in a hollow rockshaft, K, which has a partition, h,running longitudinally down it for the purpose.

Thsrock-shaft works in bearings i t', on the bedplate, and has thepiston-rod firmly bolted or secured to it, 'whereby it serves to formthe trunnions vfor the piston and'cylinder to oscillate on, to theextent of the versed sine of thearc described by the beam or lever O,-

with which-. thecylinder is connected. This shaft K works at Aits 'oneand open end against and Iwithin an' adjustable packing-cap, L, that hasthe steam and exhaust-pipes connected with it at openings k k, which arein vcommunication with the pas- V sages f and g.

. The valve'I is operated by ya rod, m, arranged to run down theinlet-passage' d, within the piston-rod, and in gear at its foot withv atoe, n, attached to a rock-shaft, 0, which receives its Vmotion from themain shaft G, through an eccentric, r, rod, s, and crank, u.

Any other devices, however, may be used for conveying motion to 'thevalve-rod arranged within the .piston-rod.

. An engine thus constructed and operating, combines eicency withcompactness, the same admitting -of a. `comparatively short walking-beamor main lever, O,

being used without forming an objectionable workingangle, and withoutthe aid of a pitman, while an independent valve-box is dispensed with,the piston being utilized as such, and the piston-rod serving to protectthe ro'd which operates the valve, also serving to establish inlet 'andexhaust-passages, thereby doing away with independent pipesorconnections from the valve.

Of course any other` fluid, gas, or vapor besides steam, may be`nsed forworking the engine.

"The position of .the engine may, if desired, be reversed or changed tothatshown in the drawing.

What is here claimed, and desired to be secured by Letters Patent, is

1. The combination of the reciprocating cylinder B -with the piston H,arrangedjto have a stationary position in relation to the reciprocatingcylinder, and both free to oscillate on or in connection with arock-shaft, K, to which the piston-rod is attached at its outer end, orbeyond the one end, of the cylinder, substantially as specified.

2. The arrangement of the valve l, lby which the admission and dischargeof the steam to and from the 'working-cylinder are controlled within thepiston, forl operation in connection with the ports or passagesal and bb, 'essentia1ly as described.

3. The arrangement, with relation to the main valve and ports, of thehollow piston-rod J, constructed with diaphragm c, forming inlet andexhaust-passages d e, and terminatingl in Va hollow oscillating bearing,substantially as shown and described.

W. H. CARR.

' Witnesses:

HENRY T. BROWN, l. H. BROWN.

